nav{
    .head{
        z-index: 1;
        .back{
            width: 20%;
            
        }
        .title{
            width: 60%;
        }
    }
}
main{
    .btn{
        border-radius: 2px;
        border: none;
        background-color: #ccc;
        width: 15px;
        height: 15px;
    }
    .work{
        .condition {
            width:70px;
            height: 25px;
            background-color: #ccc;
            color: #525050;
          }
          .logo{
            img{
                width: 48px;
                height: 48px;
            }
          }
    }
}